激光与光电子学进展, 2018, 55 (6): 061101, 网络出版: 2018-09-11
陶瓷基复合材料的太赫兹无损检测方法 下载: 1427次
Terahertz Nondestructive Detection Method of Ceramic Matrix Composites
成像系统 陶瓷基复合材料 太赫兹透射时域光谱成像技术 无损检测 尺度不变特征变换 imaging systems ceramic matrix composites terahertz transmission time-domain spectral imagin nondestructive detection scale invariant feature transform
摘要
提出了一种时频域多模式新光谱成像方法,对内含缺陷的4种陶瓷基复合材料(CMC)样本实现了无损检测,形成了检测样本的太赫兹图像库,并引入5个图像质量的客观综合评价指标,通过指标融合处理选出了质量较佳的太赫兹图像。基于尺度不变特征变换与K 均值聚类实现了该图像的检索。实验结果证实,该方法可有效地对CMC不同位置处的不同宽度缺陷进行成像检测。
Abstract
A novel spectral imaging method based on multi-modes in time-frequency domain is proposed. This method is used for the nondestructive detection of four kinds of ceramic matrix composite (CMC) samples with defects. A THz image set for the test samples is formed, and five quantity evaluation indexes for image quality are introduced. The THz images with the best quality are chosen via the index integration treatment. The retrieval of this image is realized based on the Scale Invariant Feature Transform (SIFT) feature selection and K-means clustering algorithm. The experimental results confirm that the proposed method can be effectively used in the imaging detection of the CMC materials with various defect widths at different positions.
李铁军, 孙跃, 邵桂芳, 石为人, 刘建军, 颜识涵. 陶瓷基复合材料的太赫兹无损检测方法[J]. 激光与光电子学进展, 2018, 55(6): 061101. Tiejun Li, Yue Sun, Guifang Shao, Weiren Shi, Jianjun Liu, Shihan Yan. Terahertz Nondestructive Detection Method of Ceramic Matrix Composites[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061101.